java - EventListener Freezing(Java)

好的，我的问题是拖动鼠标时mouseMoved被冻结，这是MouseMotionListener中的方法之一（mouseMoved和mouseDragged）。我认为，也许mouseDragged正在冻结mouseMoved，如果有人可以帮助我，使它不这样做，那将是非常美妙的。

import javax.swing.JFrame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseEvent;
import java.awt.Rectangle;
import java.lang.Runnable;
import java.awt.RenderingHints;
import java.awt.Graphics2D;
import java.awt.Color;

public class Window extends JFrame implements MouseMotionListener, Runnable {
    protected static int xWindow = 640;
    protected static int yWindow = 480;
    private Image dbi;
    private Graphics dbg;
    private int xMouse;
    private int yMouse;

    public void paint( Graphics g ) {
        dbi = createImage( getWidth(), getHeight() );
        dbg = dbi.getGraphics();
        paintComponent( dbg );
        g.drawImage( dbi, 0, 0, this );
    }

    public void paintComponent( Graphics g ) {
        Graphics2D g2d = ( Graphics2D ) g;
        g2d.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON );
        g2d.setColor( Color.RED );
        g2d.drawString( "Mouse X: " + xMouse + " | Y: " + yMouse, 15, 40 );

        repaint();
    }

    public void mouseDragged( MouseEvent e ) {
        e.consume();
    }

    public void mouseMoved( MouseEvent e ) {
        xMouse = e.getX();
        yMouse = e.getY();
        e.consume();
    }

    public void run() {
        while ( true ) {
            try {
                Thread.sleep( 1 );
            } catch( Exception e ) {
                e.printStackTrace();
            }
        }
    }

}

最佳答案

您正在从repaint调用paintComponent，这将导致以下方法调用链无限期重复：

paint -> (manual call to) paintComponent

要利用Swing的优化绘制模型，最好不要在顶级容器（例如JFrame）中进行自定义绘制。将所有绘画功能提取到新的基于JComponent或JPanel的类，并覆盖paintComponent。 Swing将在paintComponent上调用repaint，因此无需直接调用。不要忘记拨打super.paintComponent(g)。

从repaint内调用mouseMoved。

也不要调用Thread.sleep，这会阻止EDT并导致UI冻结。 Swing提供了自己的concurrency objects，例如Swing Timers。